Fixture for hardening dies



Jan. 18, 1949 F. F. ROTH, JR 2,459,183

FIXTURE FOR HARDENING DIES Filed Oct. 1, 1946 5 Sheets-Sheet l INVENTOR. 3:51-11 F. Ruth, J1.

F1 g. 3- I #J WMWM ATTORNEYS Jan. 18, 1949. F. F. ROTH, JR 2,459,133

FIXTURE FOR HARDENING DIES Filed 001". l, 1946 5 Sheets-Sheet 2 l I l M /2 l I 46 INVENTOR.

ATTORNEYS Jan. 18, 1949. ROTH, JR 2,459,183

FIXTURE FOR HARDENING DIES Filed 001;. 1, 1946 '5 Sheets-Sheet s I m- T$ INVENTOR. Frank F: Ruth .Jn

ATTDR'NEY'S Jan. 18, 1949. JR 2,459,183

FIXTURE FOR HARDENING DIES Fil e d Opt. 1, 1946 5 Sheets-Sheet 4 IN V EN TOR.

Frank F. RnnhJr.

JW MM! #372544 ATTEIRNEYEI- Jan. 18 1949. RQTH, JR 2,459,183

FIXTURE FOR HARDENING DIES 'Filed Oct. 1, 1946 5 Sheets-Sheet 5 HARDENED AREA INVENTOR. Frank FL Rc|h,JI: BY

ATTEIRNEYS- Patented Jan. 18, 1949 I FIXTURE! F08: HARDENING DIES.

-Frank Fi Roth, Jr., PI'iiIadeIphiaLEPa. -App1ication- Dumber-1,4946, .Seri'al'No; 701L539 1 Claim. 1' (Cl. 134-'-105) (Grantedaundervthexract off-Marclrl:3, 1883,1215 amerided-flpribfil), 1928;? 3:70 20. G'. .757)

The invention describedhereirrzmayvbe manu factured and used byor for'the .Government-ior governmental purposesgwithout thenpayment to me of any royalty thereon.

This invention relates to a: -fixture forehardening' metal 'parts which have a cylindrical; opening throughthem, such as. dies-.for small: arm'rca tridges or the like, by dippingthe partsin and flowing through the opening in i the parts-a quenchingfiuid; such as water.

More specifically,- this. invention relates. to r a hardening and quenching fixture having means for. clamping therein a perforated-workpiece: to be hardened, said means being .pivotallyrmounted.

and connectedtoa handle: so. that theworkpiece canbeclipped in a tankof hardeningliquid'while at the same time the ..hardening.-.liquid. is fed.- through a perforation in. the. workpiece.

It is an object of thisinvention to. provider-a. hardening fixture which..has the-.following-am.

vantages among others. Theehardening. fixture can be operated by unskilled laboizand gives 100%- uniform hardening. The hardening i'ixturegbeing pivotally mounted on.atfixecl.suppor,t; lsanuch safer than the manually-operated and supported" tongs heretoforeused. .zItis muchwhealth-iierr'to operate the hardening fixture ofthis invention because fatigue of theoperatoris lessened since the. part neednot be supported-by theoperator and since. there is no necessity for the-operator,-

to dip his hands in .the Water or. hardeningiliquid.

. Other objects and'aclvantagesotv this invention will be readily apparent ozvmay berlearned from annexed drawings and specification to? which reference is here made *forwaclearrand concise-1 descriptionof this invention.

In the accompanyingdrawings:

Fig. l is an end elevation'of.thezhardening fix ture. of this invention.

Fig. 2 is. an. elevational viewvof theopp'osite;end of the hardening fixturewith par-ts brokemaway" horizontally.

Fig. 3 isa .horizontal crcssrsectiorr; unlined-#8 of Fig. 5.

. Fig.4. is. a top-or plan-viewof.-the.ahardening.=

fixture showing. the tank, with-whichdt is'zused. indotted and dashed :lines. and with the handle broken away vertically intermediate its ends.

l is a. front elevation --with; vpa-rts=brok.en

away: horizontally for clarity.

Fig. 5A (Sheet 4) is a' front: elevationofi the hardening fixture, the handle and slidableubody being raised, ready to receive..a-.workpiece therein.

Fig. 6 is a vertical transverse cross sectionron line 5-6.-'of. 5.

similar to FigJll showing. some of'theipartsina difierentcposition.

121's 2: vertical. longitudinal xcross section on line .I 2l 2.:ofi Fig; 4.

. Fig. 12A (Sheet; 5):..is1 a vertical: longitudinal crnss secti'om similar. tux-Fig..- 12: showing a workpiece a of: smaller" diameter.

12B. GSheetr 5) .isa vertical. longitudinal crossnsection sin'rilan. toEFig; 12 1 showing: a workpieceashorter'in length? andusma'ller in diameter.

Fig; 13 is: ashoriznntal cross. section on line --F.ig.e14iis' an oblique: elevation. asseen from line 14-! Iota-Fig; 1.

rFigl 15% is an: elevational. view. showing a": works piecehard'ened the fixture of thiszinvention, cutiimthalfgetchedgandtpolished to render the hardenedi area visibleto ltheanaked eye.

' One embodiment of: thiszrhardening 'fixture. is

- as? follows. .611? the: tank:T,-..or likecontainer for quenching and cooling: liquids such as water, is mounted: asupport l53having-rearwardly projectingv sides d-E and) l'lrso thatalthe support: is substantially: Gs-shapedr :imhorizontal cross section, as is seen in Figs. 3 and 13. .Through-mthesides |-6428HC111113P8JSS .arr;upper'.pa.i1'.i:of:holes? l8- and a lowerepairt-ofixhcles' zciinnumbierad) in. which is secured aWpinJ-Q. A pair ofzclamps? 22am secured by headed screws 23 to th'eaupper; end" of support [5-3503 as to'imountathe. support1firmly on the rim ofiEtheutank 1T.

1 Pin. 1 9; passesthrough: a" hole: inzlthe. lower. end ofsalink: which'hasscnritstrearrface. a stiffening rib: 2 sothat the -link 2 0 is substantially T-shaped iII'NhOIiZOIIlSEICI'OSS section (Figs. :3 and 13). Fig. 14 shows thatv liour; screwsi24 spassthrough the..-upper1-end::of :linkr 2E! and: fasten. a: :body'." 25 securelyonthe-upperi-on .freeeend-of: link. 21]. Fig. 8 ShOWSiithHtSbOflyif 25; is substantially? \lshapecl s siiizmz 'verticalzt:transverseucrossszsectionrand :has a workpiece W which is to be quenched and hard:

ened. The perforation 29, the opening in gasket 3|, the opening in ring 32 and the perforation P (passing through the workpiece W) are all aligned and in communication with one another. A plurality of drains 33, of which but one appears in the drawings, pass through body 25 adjacent the lowermost part of the edge of gasket 3|.

Fig. 9 shows that body 25 may, if desired, have a V-shaped supporting block 34 secured to it by means of screws 35 for example. Fig. 9A shows supporting block 34A secured to the body 25 by means of elongated screws 35A. Supporting block 34A is much thicker than supporting block 34 so as to support workpiece WW which is much smaller in diameter than workpiece W so that the perforation P in the workpiece WW is properly aligned with the perforation or inlet opening 29 in the body 25.

Figs. and show that body 25 has secured to it by means of screws 36 an L-shaped stop 31'. These figures also show that the body 25 carries link-pivot screws 38 which are tapped into the body 25. Each screw has an intermediate cylindrical portion 39 upon which rotates one end of one of a pair of links 40. The opposite ends of links 40 ride on the intermediate cylindrical por-v tion 4| of one of a pair of link-securing screws 42 whose inner ends have screw-threaded en-' mediate cylindrical portion 41 upon which are journaled the rear ends of a pair of bars 48 and 49 which form 'the upper and lower sides of a handle. A pair of tubes 5|] form the vertical pieces of the handle each being secured in position by a headless bolt 5| held onto the bars 48 and 49 Figs. 6, 11 and 11A show that the inner end of bar 48 has a cam 53 on it.;

by means of nuts 52.

Bar 49 has on it a similar cam (not numbered). Cam 53 is provided with a flat cam face 54 and a curved cam face 55.

Figs. 4, 5, 5A and 12 show that movable body 45 has, at its inner or right-hand end confronting the perforated left-hand face of body 25, an en-- 4 the perforation P in the workpiece W. At the outer or left-hand end of movable body 45, a flat ring-shaped spring retainer BI is connected to the movable body 45 by means of set screws 62 (Figs. 5 and 7) A coil spring 63 is interposed between the link support 43 and the enlarged portion 51 of movable body'45 and stresses the movable body 45 towards the confronting face of body 25. Support l5 has a stop 64 on it which engages the handle to limit its travel in one direction.

I The operation of the hardening fixture of this invention is as follows:

A hose is connected to hose connection 28 so I as to conduct water to the perforation 29, the

. shown) supply of water'being controlled by a valve (not The tank T is filled with water to a desired level. Depending upon the size of the ope'ratorythe pin I9 is passed through the lower 7 holes in the walls l6 and I! (as shown) or is passed through the holes l8. This varies the pivot about which rotate link 20 and all the other parts of the hardening fixture which are supported by link 25. Fig. 5A shows the hardening fixture in the starting position. The abutment of the top edge of one of the links 40 against the vertical face of the L-shaped stop 3'! limits the amount of turning movement of the parts in a clockwise direction, as is seen in Fig; 5A. The handle and its associated parts are turned counterclockwise until they assume'a horizontal position. in which they are seen in Fig. 5. The handle is then moved to the right. Figs. 11 and 11A show that this right-ward turning movement of the handle removes the fiat cam face 54 from engagement with the spring retainer 5| and allows the flat face of the spring retainer 6| to engage with the curved cam face 55' of the cam 53 and allows the spring 63 to expand, carrying with it the movable body 45. This movement of movable body, continues-until its enlarged end 5'! engages with the end of the work-piece W so that the spring 63 holds the workpiece W in firm but yielding engagement between the confronting faces of the movable body 45 and the body 25.

,' The handle may be then pushed away from the.

operator about the pin H! as a pivot so that the link 20 and all the parts supported by it turn in a counter-clockwise direction as seen in Fig. 1, the turning movement being shown in Fig. 1 as having already commenced. When the perforation 60 overlies the tank T, the valve (not shown) is turned on so that the quenching and hardening liquid flows through the perforation 29in the hose 28, the perforation through gasket 3 through adjusting ring 32, the central perfora tion P in the workpiece W, and out through the larged face provided'with a flange 56'at the upper" portion thereof. Fig. 8 shows that movable body 45 has at the lower end of its enlarged portion 51 two flat faces 58 which are tangential to the outer cylindrical surface of the body 45 and which are adapted to ride on the flat inner surfaces of the' through movable body 45 and communicates-with.

perforation 60 in the movable body 45. The discharge of this liquid is caught in the tank T. At the same time, or as desired, the turning movement of the parts about the pin l 9 as a pivot may be continued until the free end of the link m and the workpiece W carried thereby are dipped into the hardening liquid" in the tank, T. When the quenching and hardening of the workpiece W, due to its emersion in the hardening liquid in the tank T, has continued for the desired period of time. the handle is pulled toward the oper ator or in a clockwise direction as seen in Fig.1.

This lifts the workpiece W out of the hardening and quenching liquid and raises it upuntil the link 20 engages support 5 and limits further lift-- ing movement. The handle is then moved to the left so that the curved cam face of the cam -53 engages the inner flat face of the spring retainer :fil. Continued turning movement of the handle compresses the spring 63 until the flat cam face 54 of the cam 53 engages the flat inner face of the spring retainer BI and latches the spring 63 in compressed position. This compression of spring 63 removes the enlarged head 51 of the movable body 45 from the workpiece W. The handle may then be turned clockwise, as seen in Fig. 5A, leaving the workpiece W resting on the V-shaped support block 34. The hardened and quenched workpiece W can then be removed from the V-shaped supporting block 34 and a fresh, heated workpiece W be placed on the V-shaped supporting block 34 for quenching and hardening by a repetition of the foregoing sequence of steps.

A thicker V-shaped supporting block 34A may be secured to the body by means of elongated screws A in place of the V-shaped supporting block 34. This choice of a V-shaped supporting block to suit the size of the workpiece undergoing treatment insures that the perforation P in the workpiece is properly aligned with the inlet perforation 29 so that quenching fluid can flow through the hole in the workpiece.

Fig. 12A shows that when a V-shaped supporting block 34A of increased thickness is used to support a workpiece WW of reduced diameter, a gasket G can be employed surrounding the righthand end of the workpiece WW which abuts adjusting ring 32 so as to insure a tight seal around the workpiece WW and prevent the escape of quenching liquid flowing from the inlet perforation 29 through the perforation PP in the workpiece WW.

Fig. 123 shows that, when a workpiece WWW is to be quenched and hardened which is both of smaller diameter and of short length, a perforated fitting M having one outside diameter of reduced size (as shown at S) can be mounted in the movable body 45 to take up the space between the enlarged end 51 of the movable body 46 and the confronting face of the body 25. Fixture M holds the workpiece WWW firmly in the desired position. Fixture M has an opening 0 axially through it communicating at one end with the perforation PPP Within the workpiece WWW and at the other end with the outlet opening 60 in the movable body 45.

I claim:

For heat treating and hardening perforated metal parts such as dies and similar articles by dipping them in a quenching liquid and by flowing the quenching liquid through the perforations in the metal parts, a fixture including, a support mounting the fixture adjacent a tank containing a quenching liquid, a link pivoted on said support and having a portion spaced from said pivot and rotatable about said pivot so as to be dipped into or be lifted out of the quenching liquid, a first body mounted on said rotatable portion of said link and having a perforated part for engagement with one end of the die so that the perforations in the die and said first body communicate, a movable body slidable on said first body and having a perforated part for engagement with the other end of the die so that the perforations in the die and in the movable body communicate when the part to be quenched and hardened is secured between the confronting portions of said bodies, means including a hose connected to one of said bodies for use in conveying the quenching liquid through the perforations in that body, through the perforations in the part being heat treated and out through the perforations in the other of said bodies, a spring stressing said movable body toward the confronting portion of said first body, a handle pivotally mounted so as to move said link about its pivot for dipping the part carried between said bodies into the quenching and hardening liquid, and a cam located between said handle and said movable body and arranged upon another movement of said handle to compress or release said spring so as to clamp or unclamp said part between the confronting portion of said bodies.

FRANK F. ROTH, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 65,598 Piper June 11, 1867 268,164 Woodruff et al Nov. 28, 1882 1,327,443 Olson Jan. 6, 1920 1,513,974 Ehn Nov. 4, 1924 2,141,081 Davenport Dec. 20, 1938 FOREIGN PATENTS Number Country Date 38,338 Germany Mar. 4, 1887 43,565 Germany July 6, 1888 

